I installed True Image Echo Server within a Windows Server 2008 Hyper-V virtual machine, and then tried making a .tib system drive backup file into another virtual machine (.vhd). It said that the backup file was corrupt. I then tried installing True Image Echo Server on the Windows Server 2008 parent partition that runs Hyper-V instead (ie. on the physical machine, not a VM), and it worked fine. The .tib file was exactly the same (MD5 checksum). So, does True Image Server not work within a Hyper-V virtual machine? Is it necessary to use it only on the physical hardware?